NYAP: a phosphoprotein family that links PI3K to WAVE1 signalling in neurons.
EMBO J
; 30(23): 4739-54, 2011 Sep 23.
Article
en En
| MEDLINE
| ID: mdl-21946561
ABSTRACT
The phosphoinositide 3-kinase (PI3K) pathway has been extensively studied in neuronal function and morphogenesis. However, the precise molecular mechanisms of PI3K activation and its downstream signalling in neurons remain elusive. Here, we report the identification of the Neuronal tYrosine-phosphorylated Adaptor for the PI 3-kinase (NYAP) family of phosphoproteins, which is composed of NYAP1, NYAP2, and Myosin16/NYAP3. The NYAPs are expressed predominantly in developing neurons. Upon stimulation with Contactin5, the NYAPs are tyrosine phosphorylated by Fyn. Phosphorylated NYAPs interact with PI3K p85 and activate PI3K, Akt, and Rac1. Moreover, the NYAPs interact with the WAVE1 complex which mediates remodelling of the actin cytoskeleton after activation by PI3K-produced PIP(3) and Rac1. By simultaneously interacting with PI3K and the WAVE1 complex, the NYAPs bridge a PI3K-WAVE1 association. Disruption of the NYAP genes in mice affects brain size and neurite elongation. In conclusion, the NYAPs activate PI3K and concomitantly recruit the downstream effector WAVE complex to the close vicinity of PI3K and regulate neuronal morphogenesis.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Encéfalo
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Neuritas
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Neocórtex
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Fosfatidilinositol 3-Quinasas
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Proteínas Adaptadoras Transductoras de Señales
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Familia de Proteínas del Síndrome de Wiskott-Aldrich
Límite:
Animals
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Humans
Idioma:
En
Revista:
EMBO J
Año:
2011
Tipo del documento:
Article
País de afiliación:
Japón